No, they do have the advantage of being available on a large number of platforms. This means I can buy a movie from Amazon and feel confident that in 2 years if

No, they do have the advantage of being available on a large number of platforms. This means I can buy a movie from Amazon and feel confident that in 2 years if I decide to buy a different TV, a different set-top box, a different video game console, a different tablet, I probably (but of course not guaranteed) can still watch that movie on it. That's like, a real advantage.